Transcript for Trump threatens to 'decertify' the Iran Nuclear agreement
Thanks. Another major move from the president. Decertifying the Iran nuclear agreement telling congress to impose new sanctions or he'll leave the deal completely. Swift reaction tonight. Here's ABC's chief white house correspondent Jonathan Karl. Reporter: The president today declared Iran is not keeping its side of the nuclear agreement negotiated under president Obama. The Iran deal was one of the worst and most one sided transactions the United States has ever entered into. Reporter: The president called on congress to imposeew sanctions on Iran if it does not curb its missile program and its support for terrorism. Things not covered under the nuclear agreement. The Iranian regime continues to fuel conflict, terror and turmoil throughout the middle East and beyond. Importantly, Iran is not living up to the spirit of the deal. Reporter: President trump stopped short of doing what he said he would do during the campaign, get out of the deal, a step that would give Iran a green light to restart its nuclear weapons program. You said you were going to rip the Iran deal off. I may do that. I may do that. The deal is terrible. So what we have done is through the certification process we'll have congress take a look at it and I may very well do that. Reporter: Before the president spoke secretary of state Rex tillerson had been working the phones to reassure European allies who are firmly committed to the Iran deal. Let's get to Jon Karl at the white house tonight. Secretary tillerson given the task of calling our allies. What is he hearing? They're not happy with the president's actions but after those conversations, what's notable is that France, Germany and the U.K. Did not criticize the president and said they would work with the united States on curb Iran's support for ter rival and its missile program. As for the Iran president, he said the United States is completely alone on this but the iranens said they will stay in thegreement at least for now. Jon Karl, thank you. We turn next to California's deadly and daef stevastated wildfires.
This transcript has been automatically generated and may not be 100% accurate.